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[TowerTalk] Torque absorver PTA1

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Subject: [TowerTalk] Torque absorver PTA1
From: (
Date: Wed, 12 Mar 1997 14:03:17 -0500 (EST)
In a message dated 97-03-12 12:29:29 EST, (EA3KU-Fernando
Martinez) writes:

> I am prepairing my new self-suported tower ( abt. 100 feet ) to 
>  acomodate a new OR-2800 rotator with a KLM KT34XA and a 40-2CD.
>  I ordered the OR-2800 and PTA-1 ( torque absorver ) from U.S thru my 
>  local radio stores , but the local dealer was unable to locate this 
>  PTA-1 torque absorver on U.S., he say that its not longer available.
>  That's true ?. 
>  If not, where I can buy this PTA-1 and what's is aproximative price ? .
     A nifty addition to any antenna/rotator system, the shock absorbing
properties of the rubber dampener in theory will allow a rotator to take up
to 25% more load.  The theory being that the rubber isolator will take some
of the wind torque forces off of the rotator.

     Dave Leeson, W6NL/ex-W6QHS, features a BMW drive cushion in his book
"Physical Design of Yagi Antennas". Unfortunately the KLM/M2 product didn't
perform as reliably as everyone hoped and the product has been discontinued.

     For your KT34XA/402CD load, the Orion 2800 has plenty of strength and
capacity -- you don't need any additional devices in your system that might

73,  Steve  K7LXC

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